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We wonder if apples have moreWe wonder if apples have more diseases than any other crop. If the spots on the leaves are yellow-brown and small, it might be Cedar Apple Rust. Golden Delicious is especially susceptible.  There are two ways to deal with this issue: 1) plant varieties resistant to cedar apple rust and 2)  spray protective fungicides in early spring, such as myclobutanil (Immunox). First things first: Bring a sample to a tree nursery or your cooperative extension to get a real diagnosis.